Abstract: A seal assembly for a fluid pressure control device includes a guide element having a sealing surface and a first guide surface. A throttling element assembly includes a throttling element positionable within a fluid flow path, the assembly defines a mating surface adapted to seal with the sealing surface, and a second guide surface sized to slidingly engage the first guide surface. A relief void is formed in at least one of the guide element and the throttling element assembly adjacent the first and second guide surfaces to receive loose solid material, to thereby prevent disruption of the seal formed between the sealing surface and the mating surface.

Abstract: A liner assembly adapted to line a valve body of a control valve comprises a sleeve, a liner, and a retainer. The sleeve has an inner surface and an outer surface. The inner surface defines a bore. The outer surface is adapted to be disposed in engagement with the outlet of the control valve. The liner is slidably disposed within the bore of the sleeve. The retainer is in engagement with the liner to removably secure the liner within the sleeve.

Abstract: A stackable noise attenuating disk includes an inner perimeter edge and an outer perimeter edge. A plurality of inlet passages is disposed along the inner perimeter edge and a plurality of outlet passages is disposed along the outer perimeter edge. The plurality of outlet passages includes a plurality of first outlet passages and a plurality of second outlet passages. Each of the plurality of first outlet passages have a first width and each of the plurality of second outlet passages have a second width that is greater than the first width. Fluid entering the inlet passages passes through a plenum section of adjacent disks to exit through the first and second outlet passages. The first outlet passages and second outlet passages cooperate to disperse the noise peak frequencies of fluid exiting the plurality of outlet passages, thereby reducing the overall noise level of fluid exiting the plurality of outlet passages.

Abstract: An improved fluid pressure reduction device including a perimeter and a hollow center aligned along a longitudinal axis, and further including an inlet region at the hollow center and an outlet region at the perimeter, wherein the outlet region includes multiple dimensioned outlet areas arranged to substantially reduce outlet tone generation.

Abstract: A stackable noise attenuating disk includes an inner perimeter edge and an outer perimeter edge. A plurality of inlet passages is disposed along the inner perimeter edge and a plurality of outlet passages is disposed along the outer perimeter edge. The plurality of outlet passages includes a plurality of first outlet passages and a plurality of second outlet passages. Each of the plurality of first outlet passages have a first width and each of the plurality of second outlet passages have a second width that is greater than the first width. Fluid entering the inlet passages passes through a plenum section of adjacent disks to exit through the first and second outlet passages. The first outlet passages and second outlet passages cooperate to disperse the noise peak frequencies of fluid exiting the plurality of outlet passages, thereby reducing the overall noise level of fluid exiting the plurality of outlet passages.

Abstract: A biasing device for use with a piston actuator of a fluid valve includes a tubular seat member, a tubular retention member, a tubular retention bracket, and a biasing element disposed between an external annular flange of the tubular seat member and an external annular flange of the tubular seat bracket. The tubular retention member is partially disposed within the tubular, seat member, the tubular retention member passing through an opening in the inner flange of the tubular seat member. The tubular retention member is partially disposed within the tubular seat bracket, the tubular retention member passing through an opening in the inner flange of the tubular seat bracket. The basing member is seated against the exterior annular flange of the tubular seat member and against the exterior annular flange of the tubular seat bracket.

Abstract: A pneumatic valve actuator for moving the valve stem of a control valve comprises an upper casing and a lower casing each having flanges, a diaphragm plate operatively coupled to the valve stem, a spring arranged to bias the diaphragm plate in a first direction, a diaphragm movable in conjunction movement of the diaphragm plate, an air inlet defined in the casing and arranged for attachment to an air supply source to bias the diaphragm plate in a second direction, and a ring disposed between the upper flange and the lower flange and positioned to engage the outer portion of the diaphragm. The ring includes a protrusion positioned to engage a surface of the outer portion of the diaphragm.

Abstract: A liner assembly adapted to line a valve body of a control valve comprises a sleeve, a liner, and a retainer. The sleeve has an inner surface and an outer surface. The inner surface defines a bore. The outer surface is adapted to be disposed in engagement with the outlet of the control valve. The liner is slidably disposed within the bore of the sleeve. The retainer is in engagement with the liner to removably secure the liner within the sleeve.

Abstract: A liner assembly adapted to line a valve body of a control valve comprises a sleeve, a liner and a retainer. The sleeve has an inner surface and an outer surface. The inner surface defines a bore. The outer surface is adapted to be disposed in engagement with the outlet of the control valve. The liner is slidably disposed within the bore of the sleeve. The retainer is in engagement with the liner to removably secure the liner within the sleeve.

Abstract: An improved fluid pressure reduction device including a perimeter and a hollow center aligned along a longitudinal axis, and further including an inlet region at the hollow center and an outlet region at the perimeter, wherein the outlet region includes multiple dimensioned outlet areas arranged to substantially reduce outlet tone generation.

Abstract: A valve assembly includes a valve body, a valve seat, and a valve plug. The valve body defines a flow path for a fluid. The valve plug is adapted for displacement between a closed position and an open position in the valve body. The valve plug includes a crown, a skirt and a protrusion. The crown is for sealingly engaging the valve seat when the valve plug is in the closed position. The skirt defines a flow path for accommodating the fluid when the valve plug is in the open position. The protrusion is substantially concentrically aligned with the skirt. Each of the skirt or the protrusion have a surface treatment for enhancing the flow of the fluid through the valve when in the one or more open positions.

Abstract: Field adjustable piston actuators are described. An example field adjustable piston actuator includes a housing having opposing openings and a chamber. Additionally, the example piston actuator includes a first plate coupled to the housing and adjacent one of the opposing openings. Further, the example piston actuator includes a second plate coupled to a yoke and the housing. The second plate is adjacent the other one of the opposing openings. Further still, the piston actuator includes a volume adjuster to provide field adjustment to change a volume of the chamber.

Abstract: A pneumatic valve actuator for moving the valve stem of a control valve comprises an upper casing and a lower casing each having flanges, a diaphragm plate operatively coupled to the valve stem, a spring arranged to bias the diaphragm plate in a first direction, a diaphragm movable in conjunction movement of the diaphragm plate, an air inlet defined in the casing and arranged for attachment to an air supply source to bias the diaphragm plate in a second direction, and a ring disposed between the upper flange and the lower flange and positioned to engage the outer portion of the diaphragm. The ring includes a protrusion positioned to engage a surface of the outer portion of the diaphragm.

Abstract: A seal assembly for a fluid pressure control device includes a guide element having a sealing surface and a first guide surface. A throttling element assembly includes a throttling element positionable within a fluid flow path, the assembly defines a mating surface adapted to seal with the sealing surface, and a second guide surface sized to slidingly engage the first guide surface. A relief void is formed in at least one of the guide element and the throttling element assembly adjacent the first and second guide surfaces to receive loose solid material, to thereby prevent disruption of the seal formed between the sealing surface and the mating surface.

Abstract: A seal assembly for a fluid pressure control device includes a guide element having a scaling surface and a first guide surface. A throttling element assembly includes a throttling element positionable within a fluid flow path, the assembly defines a mating surface adapted to seal with the sealing surface, and a second guide surface sized to slidingly engage the first guide surface. A relief void is formed in at least one of the guide element and the throttling element assembly adjacent the first and second guide surfaces to receive loose solid material, to thereby prevent disruption of the seal formed between the sealing surface and the mating surface.

Abstract: A liner assembly adapted to line a valve body of a control valve comprises a sleeve, a liner and a retainer. The sleeve has an inner surface and an outer surface. The inner surface defines a bore. The outer surface is adapted to be disposed in engagement with the outlet of the control valve. The liner is slidably disposed within the bore of the sleeve. The retainer is in engagement with the liner to removably secure the liner within the sleeve.

Abstract: A valve assembly includes a valve body, a valve seat, and a valve plug. The valve body defines a flow path for a fluid. The valve plug is adapted for displacement between a closed position and an open position in the valve body. The valve plug includes a crown, a skirt and a protrusion. The crown is for sealingly engaging the valve seat when the valve plug is in the closed position. The skirt defines a flow path for accommodating the fluid when the valve plug is in the open position. The protrusion is substantially concentrically aligned with the skirt. Each of the skirt or the protrusion have a surface treatment for enhancing the flow of the fluid through the valve when in the one or more open positions.

Abstract: The noise abatement device and method described herein makes known an apparatus and method for reducing the aerodynamic resistance presented by a fluid pressure reduction device in a large duct. More specifically, a noise abatement device is disclosed having at least one sparger with an aerodynamic profile that significantly reduces the fluid resistance within a turbine exhaust duct of an air-cooled condensing system that may be used in a power plant.

Abstract: A sleeve valve has a valve body and a flow passage through the valve body. The flow passage has a longitudinal axis, a valve plug positioned therein, and a slidable sleeve received therein. The sleeve is movable in an axial direction between an opened and a closed position relative to the valve plug. An interchangeable first valve plug end portion is removably mounted to part of the valve plug in the flow passage. The first end portion is removable and replaceable with another second valve plug end portion to change at least one performance characteristic of the sleeve valve. The valve plug of the sleeve valve can be selectively interchanged with a plug selected to provide one or more desired performance or flow characteristics, whether to reduce the effects of wear or to change the valve performance.

Abstract: An improved rod connector assembly and method for mechanically fastening two rods together. Generally planar mating surfaces of a first rod assembly and a second rod assembly are compressively coupled by a rod union. The compressive load by the rod union is derived from a tapered surface that provides an interference fit to a corresponding tapered surface on the first rod assembly. Clearance diameters provided within the rod union accommodate axial misalignment of the first rod assembly and the second rod assembly. The second rod assembly includes an adjustable rod adapter to provide coupling to rods of various lengths. The first rod assembly includes an internal cavity to receive a portion of the second rod that may protrude from the adjustable rod adapter. Shaped mating surfaces of the rod adapters are received in a corresponding shaped cavity of the union to prevent rotation of the adapters.